《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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主办单位: 苏州混凝土水泥制品研究院
中国混凝土与水泥制品协会

主编 : 李建华
常务副主编 : 王春蓉
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E-mail : sccpitg@126.com
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国际标准刊号(ISSN) : 1000-4637
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混凝土研究

聚氨基酸衍生型膦酸基减水剂的合成与性能研究

胡聪，周栋梁，舒鑫，杨勇

2023年第5期

摘要

引用本文

摘要：通过聚琥珀酰亚胺（PSI）与氨基开环反应，成功合成了一种新型聚氨基酸衍生型膦酸基减水剂（PSI-g-PEGAP），研究了该减水剂对水泥基材料的影响规律，并与聚羧酸减水剂（PCE）在硫酸盐耐受性方面进行了比较。此外，根据吸附测试、动态光散射表征等，分析了PSI-g-PEGAP与水泥颗粒的相互作用。结果表明：通过引入膦酸基，明显提升了减水剂的减水、保坍性能，且平衡吸附量可增大1倍；与PCE相比，流体力学直径明显增大约10倍，对硫酸盐耐受性也有显著提高。 Abstract: Through the ring-opening reaction between polysuccinimide(PSI) and amino group, a new type of polyamino acid-derived phosphate superplasticizer(PSI-g-PEGAP) was successfully synthesized. The effect rules of PSI-g-PEGAP on cement-based materials were systematically studied, and the sulfate resistance performance was compared with that of polycarboxylate superplasticizer(PCE). In addition, through adsorption tests, dynamic light scattering characterization, the interaction of PSI-g-PEGAP with cement particles was also carried out. The results show that the introduction of phosphate esters significantly improves the dispersion and retention performance of superplasticizer, and the equilibrium adsorption capacity is increased by 1 times. Compared with PCE, the hydrodynamic diameter of PSI-g-PEGAP is significantly increased by 10 times, and the sulfate resistance is also significantly improved.

胡聪,周栋梁,舒鑫,等.聚氨基酸衍生型膦酸基减水剂的合成与性能研究[J].混凝土与水泥制品,2023(5):1-6. HU C,ZHOU D L,SHU X,et al.Synthesis and Performance of Phosphate-Based Superplasticizer Derived from Polyamino Acid[J].China Concrete and Cement Product,2023(5):1-6.

应力作用下受酸雨腐蚀混凝土的力学性能研究

王海宁1，阮世华2，张英姿3，杨森3

2023年第5期

摘要

引用本文

摘要：通过配制pH=2.0的模拟酸雨溶液，采用浸泡加速腐蚀的方法，研究了不同压应力水平（28 d抗压强度的15%、20%、25%、30%）作用下混凝土不同腐蚀龄期内的力学性能变化规律。结果表明：在腐蚀初期，试件的质量与抗压强度呈现增加的趋势，而到腐蚀中后期，其质量和抗压强度均逐渐减小；随着应力水平的增加，试件的强度损失和峰值应变增大，而质量损失、峰值应力和吸能能力均减小；应力作用会加速酸雨对混凝土的腐蚀，且应力水平越高，加速腐蚀作用越显著。 Abstract: By preparing the pH=2.0 simulated acid rain solution and adopting immersion accelerated corrosion method, the change law of mechanical properties of concrete under different compressive stresses (15%, 20%, 25%, 30% of 28 d compressive strength) in different corrosion times was discussed. The results show that the mass and compressive strength of specimens increase in the early stage of corrosion, but decrease gradually in the middle and late stage of corrosion. With the increase of stress level, the strength loss and peak strain of concrete increase, while the mass loss, peak stress and energy absorption capacity decrease. The compressive stress will accelerate the corrosion of acid rain on concrete, and the higher the stress level, the more significant the acceleration effect.

王海宁,阮世华,张英姿,等.应力作用下受酸雨腐蚀混凝土的力学性能研究[J].混凝土与水泥制品,2023(5):7-11. WANG H N,RUAN S H,ZHANG Y Z,et al.Study of Mechanical Properties of Concrete Corroded by Acid Rain Under Stress[J].China Concrete and Cement Product,2023(5):7-11.

盐冻对钢筋混凝土杂散电流腐蚀的影响研究

庄华夏1,2，蔡跃波2，陈迅捷2，韦华2

2023年第5期

摘要

引用本文

摘要：设计了盐冻时混凝土杂散电流腐蚀试验和盐冻后混凝土电阻率测试试验，通过测试杂散电流密度和混凝土电阻率研究了盐冻时混凝土杂散电流的腐蚀规律及盐冻后混凝土电阻率的变化规律，揭示了盐冻对混凝土杂散电流腐蚀的影响。结果表明：盐冻时，杂散电流密度与温度正相关，冷冻过程的混凝土杂散电流腐蚀比融化过程严重，而连续冻融循环将减小混凝土杂散电流腐蚀；盐冻后，混凝土的电阻率显著降低，并随冻融循环次数的增加呈指数衰减趋势，氯盐加速了混凝土电阻率的降低；氯盐浓度越大，钢筋杂散电流腐蚀越严重。 Abstract: The stray current corrosion test of concrete during salt-freezing and the concrete resistivity test after salt-freezing were designed. The stray current density and concrete resistivity were measured to explore the rule of stray current corrosion during salt-freezing and the change rule of concrete resistivity after salt-freezing. The effects of salt-freezing on stray current corrosion of concrete were revealed. The results show that the stray current density is positively correlated with temperature during salt-freezing, the stray current corrosion of concrete is more serious in freezing process than that in thawing process, and the continuous freeze-thaw cycle will reduce the stray current corrosion of concrete. After salt-freezing, the concrete resistivity decreases significantly and decreases exponentially with the number of freeze-thaw cycles. Chlorine salt accelerates the reduction of concrete resistivity. The higher the concentration of chlorine salt, the greater the stray current corrosion of reinforcement.

庄华夏,蔡跃波,陈迅捷,等.盐冻对钢筋混凝土杂散电流腐蚀的影响研究[J].混凝土与水泥制品,2023(5):12-16. ZHUANG H X,CAI Y B,CHEN X J,et al.Effect of Salt-freezing on Stray Current Corrosion of Reinforced Concrete[J].China Concrete and Cement Product,2023(5):12-16.

相同和易性和强度条件下天然砂和机制砂混凝土配合比研究

林天乐1，陈振光2，张春英3，范同发2，马腾4，张利锋1，钱晓倩1

2023年第5期

摘要

引用本文

摘要：研究了相同和易性和强度等级条件下，天然砂混凝土和机制砂混凝土配合比的差异。结果表明：在坍落度40～200 mm、强度等级C20～C45范围内时，通过同时提高2%～4%的砂率和0.037～0.082的浆骨比，可以使机制砂混凝土具有与天然砂混凝土相同的和易性；当水灰比相同时，砂率和浆骨比的调整并不影响机制砂混凝土的28 d抗压强度，水灰比定则对机制砂混凝土仍然适用；当坍落度相同时，随着强度等级的提高，机制砂混凝土较天然砂混凝土的浆骨比增量增加；在低坍落度（40 mm）条件下，对于不同强度等级的混凝土，掺加减水剂均可减少机制砂对混凝土砂率和浆骨比的影响。 Abstract: The difference of the proportion of mixture between natural sand concrete and manufactured sand concrete under the condition of the same workability and strength grade was studied. The results show that by increasing the sand ratio(2%~4%) and the paste-aggregate ratio(0.037~0.082), the workability of manufactured sand concrete with the slump of 40~200 mm and the strength grade of C20~C45 can be the same as that of natural sand concrete. When the water cement ratio is the same, the adjustment of sand ratio and paste-aggregate ratio does not affect the 28 d compressive strength of manufactured sand concrete, and the water cement ratio rule is still applicable to manufactured sand concrete. Under the same slump, the increment of the paste-aggregate ratio of manufactured sand concrete compared with natural sand concrete increases with the increase of the strength grade. Under the condition of low slump(40 mm), the influence of manufactured sand on sand ratio and paste-aggregate ratio of concrete can be weakened by adding water reducing agent.

林天乐,陈振光,张春英,等.相同和易性和强度条件下天然砂和机制砂混凝土配合比研究[J].混凝土与水泥制品,2023(5):17-21,26. LIN T L,CHEN Z G,ZHANG C Y,et al.Study on Mix Proportions of Manufactured Sand Concrete and Natural Sand Concrete with the Same Strength and Workability [J].China Concrete and Cement Product,2023(5):17-21,26.

混凝土建筑3D打印计算机模拟研究综述

李特1，李琦2

2023年第5期

摘要

引用本文

摘要：总结了国内外混凝土建筑3D打印计算机模拟研究现状，介绍了计算机模拟技术在建筑3D打印性能以及流动性、堆积性和形态检测中的应用情况，并对计算机模拟技术在建筑3D打印中的应用进行了展望。 Abstract: The research status of computer simulation in concrete architectural 3D printing at home and abroad is summarized. The application of computer simulation technology in building 3D printing performance, fluidity, stacking, and morphology detection is introduced, and the application of computer simulation technology in building 3D printing is prospected.

李特,李琦.混凝土建筑3D打印计算机模拟研究综述[J].混凝土与水泥制品,2023(5):22-26. LI T,LI Q.A Review of Computer Simulation Research on Concrete Architectural 3D Printing [J].China Concrete and Cement Product,2023(5):22-26.

基于基本需水率法的砂浆堆积密实度测试及预测模型

王辉，赵嘉兴，何世钦，刘旭辉

2023年第5期

摘要

引用本文

摘要：基于基本需水率试验方法，测试了不同材料组成下砂浆的基本需水率和堆积密实度，分析了石粉含量、粉煤灰掺量、级配、体积砂率对砂浆堆积密实度的影响，建立了基于上述4个变量的砂浆基本需水率预测模型和堆积密实度预测模型，并通过试验验证了预测模型的准确性。此外，采用常用的湿测法对砂浆的堆积密实度进行了测试，其结果与所提出的基于基本需水率法的测试结果以及预测模型的计算结果吻合度较高，证明了基于基本需水率的砂浆堆积密实度测试方法的可行性。 Abstract: A test method based on the basic water demand rate was adopted to test the basic water demand rate and packing density of mortar under different material compositions, and the influences of limestone powder content, fly ash content, gradation and sand-mortar ratio on the packing density of mortar were analyzed. The prediction models of mortar basic water demand rate and packing density were established based on the above four variables, and the accuracy of the prediction models were verified by tests. In addition, the common wet packing method was used to test the packing density of mortar. The results are in good agreement with the test results of the method based on the basic water demand rate method and the calculation results of the prediction model. It is proved that the method based on the basic water demand rate is feasible.

王辉,赵嘉兴,何世钦,等.基于基本需水率法的砂浆堆积密实度测试及预测模型[J].混凝土与水泥制品,2023(5):27-31. WANG H,ZHAO J X,HE S Q,et al.Test and Predictive Model of Mortar Packing Density Based on Basic Water-powder Ratio[J].China Concrete and Cement Product,2023(5):27-31.

多功能防腐阻锈剂对钢筋混凝土性能的影响

刘喜旭1，张小平2，严涵2，马琳2，柯伟席2

2023年第5期

摘要

引用本文

摘要：研制了一种防腐阻锈剂（MA），并研究了其对钢筋混凝土力学性能、耐久性能的影响。结果表明：基于对照组，掺MA的混凝土7 d和28 d抗压强度比分别为115%和108%，其氯离子扩散系数比为71.94%；通过钢筋耐盐水浸渍试验发现，MA具有良好的阻锈效果；掺MA的砂浆抗蚀系数为1.13，20 ℃和40 ℃水浴养护下砂浆的7 d限制膨胀率分别为0.028%和0.035%，28 d限制膨胀率分别为0.040%和0.039%，具有一定的补偿收缩作用。 Abstract: A multifunctional sulfate-resistant and corrosion-inhibition admixture(MA) was developed, and its effects on the mechanical properties and durability of reinforced concrete were studied. The results show that based on the control group, the 7 d and 28 d compressive strength ratios of concrete doped with MA are 115% and 108%, respectively. The chloride ion diffusion coefficient ratio of concrete is 71.94%. The salt water immersion test of steel bar shows that MA has good rust resistance effect. The corrosion resistance coefficient of mortar doped with MA is 1.13, and the 7 d limit expansion rates of mortar measured at 20 ℃ and 40 ℃ water conservation conditions are 0.028% and 0.035%, respectively, and the limited expansion rates of 28 d are 0.040% and 0.039%, respectively, and has a certain effect of compensating shrinkage.

刘喜旭,张小平,严涵,等.多功能防腐阻锈剂对钢筋混凝土性能的影响[J].混凝土与水泥制品,2023(5):32-35. LIU X X,ZHANG X P,YAN H.Effect of Multifunctional Sulfate-resistant and Corrosion-inhibition Admixture on Properties of Reinforced Concrete[J].China Concrete and Cement Product,2023(5):32-35.

水泥混凝土制品

荷载与海水环境耦合作用下钢筋混凝土梁的抗弯性能研究

姜鹏洲，王玉田，姜福香，张龙，张宝烁

2023年第5期

摘要

引用本文

摘要：通过对普通钢筋混凝土梁进行前期加载和海水干湿循环试验，使试验梁发生接近实际结构的机械与钢筋锈蚀耦合损伤，并对耦合损伤试验梁进行了抗弯加载试验。结果表明：耦合损伤梁的破坏形态均为适筋破坏；损伤度越高，耦合损伤试验梁的钢筋屈服越早，裂缝发展及顶部混凝土破坏过程相对越快，其屈服荷载、抗弯承载力、刚度退化也越明显；随着荷载的增加，耦合损伤试验梁的刚度退化速度和幅度也越明显。结合耦合损伤梁试验数据，对普通梁抗弯承载力、刚度理论计算公式的相关参数进行了拟合修正，推导出了耦合损伤试验梁的抗弯承载力和刚度计算公式。 Abstract: Through pre-loading and seawater dry-wet cycle tests on ordinary reinforced concrete beams, the test beams had mechanical and steel corrosion coupling damage close to the actual structure, and the flexural loading test of the coupled-damaged test beams was carried out. The results show that the failure modes of coupled-damaged beams are all suitable reinforcement failures. The higher the damage degree of the test beam, the earlier the reinforcement yielded, the faster the crack development and the top concrete failure process, the yield load, flexural bearing capacity and stiffness of the test beam degenerate obviously. As the load increases, the rate and magnitude of stiffness degradation become obvious. In addition, combined with the test datas of coupled-damaged beams, the relevant parameters of the theoretical calculation formulas of flexural bearing capacity and stiffness of ordinary beams are fitted and revised. The calculation formulas of flexural bearing capacity and stiffness of beams with coupling damage of load and seawater environment are deduced.

姜鹏洲,王玉田,姜福香,等.荷载与海水环境耦合作用下钢筋混凝土梁的抗弯性能研究[J].混凝土与水泥制品,2023(5):36-41. JIANG P Z,WANG Y T,JIANG F X,et al.Study on Flexural Performance of Reinforced Concrete Beams Damaged by Coupling of Loads and Seawater Environment[J].China Concrete and Cement Product,2023(5):36-41.

芯模振动成型高强度等级混凝土排水管的试验研究

谈维汉，侯雷

2023年第5期

摘要

引用本文

摘要：为探索芯模振动成型高强混凝土排水管的可行性，结合实际生产经验，确定了C70混凝土配合比和芯模振动成型参数，试制了6根公称内径为1 500 mm的钢筋混凝土排水管，在覆盖淋水和自然养护条件下，分别测试了同条件养护立方体试块和管体芯样强度。结果表明：芯模振动工艺在满足质量控制要求情况下，可以成型高强混凝土的排水管；覆盖淋水养护较自然养护更有利于管体混凝土强度的增长。 Abstract: In order to explore the feasibility of forming high-strength concrete sewer pipes by core mold vibration technology, combined with actual production experience, the C70 concrete mix proportion and core mold vibration molding parameters were determined, and six reinforced concrete sewer pipes with a nominal inner diameter of 1 500 mm were trial-produced. Under the conditions of wet covering and natural curing, the strength of the same curing blocks and the core drilling blocks were tested respectively. The results show that the high-strength reinforced concrete sewer pipes can be formed by the core mold vibration technology under the condition of meeting the quality control requirements. Wet covering curing is more conducive to the strength growth of pipe concrete than natural curing.

谈维汉,侯雷.芯模振动成型高强混凝土排水管试验研究[J].混凝土与水泥制品,2023(5):42-44. TAN W H,HOU L.Experimental Study on High-strength Concrete Sewer Pipes Formed by Core Mold Vibration Technology[J].China Concrete and Cement Product,2023(5):42-44.

CFRP加固钢筋混凝土柱复合受扭性能试验研究及损伤分析

朱印辛，邵永健，谢强

2023年第5期

摘要

引用本文

摘要：为研究CFRP加固钢筋混凝土柱的复合受扭性能，设计了4个CFRP加固钢筋混凝土柱（CCZ柱）试件，开展了压弯剪复合受力状态下的单调受扭试验，研究了配筋率和CFRP加固方式对试件破坏形态、延性系数、扭矩-扭率（T-θ）曲线的影响，并进行了损伤演变分析。结果表明：当CFRP发生断裂后，试件将发生破坏；环贴+纵贴CFRP加固试件的受扭性能和延性较好，且配筋率对试件的受扭性能和延性影响较小；纵筋配筋率会影响试件的损伤形态，纵筋配筋率越大，试件损伤程度越小。 Abstract: In order to study the composite torsional performance of CFRP reinforced concrete columns, four CFRP reinforced concrete columns (CCZ columns) were designed with reinforcement ratio and CFRP reinforcement method as parameters. The monotone torsional tests were carried out under the combined stress state of flexural, shear and torsion. The failure forms, ductility coefficient and torque-torsion curve characteristics were studied, and the damage evolution was analyzed. The results show that the CCZ column is damaged after the carbon fiber cloth around it breaks. The torsional properties and ductility of the specimens reinforced with circumferential and longitudinal CFRP are improved, and the reinforcement ratio has little effect on the torsional properties and ductility. The ratio of longitudinal reinforcement has a great influence on the damage of specimen. The larger the ratio of longitudinal reinforcement, the smaller the damage degree of composite torsion of specimen.

朱印辛,邵永健,谢强.CFRP加固钢筋混凝土柱复合受扭性能试验研究及损伤分析[J].混凝土与水泥制品,2023(5):45-49. ZHU Y X,SHAO Y J,XIE Q.Experimental Study and Damage Analysis of CFRP-Reinforced Concrete Columns Under Combined Torsion[J].China Concrete and Cement Product,2023(5):45-49.

纤维水泥制品

超高性能混凝土的收缩性能及收缩预测模型研究

徐怡，陈阳杰，谭昕，李梦翔，康璇，童松如，茅俊涛

2023年第5期

摘要

引用本文

摘要：试验研究了钢纤维掺量（0、1%、2%）对超高性能混凝土（UHPC）收缩性能的影响，对比分析了5种常用的混凝土收缩预测模型对UHPC的适用性，并基于试验数据建立了适用于UHPC的收缩预测模型。结果表明：掺钢纤维UHPC的收缩应变低于未掺钢纤维的对比组，且钢纤维掺量越大，对UHPC的减缩效果越显著；5种常用的混凝土收缩预测模型对UHPC的适用性较低，其中，ACI 209（92）模型高估了UHPC的40 d后收缩应变，B3模型、CEB-FIP 90模型和中国建科院模型低估了UHPC的收缩应变，GL2000模型对90 d龄期时的收缩应变预测值与试验值相对较为接近；建立的指数函数形式的UHPC收缩应变计算模型的精度较高。 Abstract: The influence of steel fiber content(0, 1%, 2%) on the shrinkage performance of ultra-high performance concrete(UHPC) was studied through experiments. The applicability of five commonly used concrete shrinkage prediction models to UHPC was compared and analyzed, and a shrinkage prediction model suitable for UHPC was established based on the test datas. The results show that the shrinkage strain of UHPC mixed with steel fiber is lower than that of comparison group without steel fiber, and the greater the content of steel fiber, the more significant the shrinkage reduction effect of UHPC. The applicability of five commonly used concrete shrinkage prediction models to UHPC is low. ACI 209(92) model overestimates the shrinkage strain of UHPC after 40 days, B3 model, CEB-FIP 90 model and China Academy of Building Research model underestimate the shrinkage strain of UHPC, and GL2000 model predictes the shrinkage strain at the age of 90 days relatively close to the test value. The calculation model of UHPC shrinkage strain in the form of exponential function has high accuracy.

徐怡,陈阳杰,谭昕,等.超高性能混凝土的收缩性能及收缩预测模型研究[J].混凝土与水泥制品,2023(5):50-54. XU Y,CHEN Y J,TAN X,et al.Study on Shrinkage Performance and Shrinkage Prediction Model of Ultra-High Performance Concrete[J].China Concrete and Cement Product,2023(5):50-54.

碱激发再生骨料纤维混凝土的工作性和力学性能研究

王连坤，林文皓，刘杰，梁锡东

2023年第5期

摘要

引用本文

摘要：研究了碱激发剂浓度（2%、5%、8%）和再生粗骨料取代率（0、25%、50%、75%、100%）对PVA纤维混凝土坍落度、抗压强度、劈裂抗拉强度和轴心抗压强度的影响，建立了碱激发再生骨料纤维混凝土的力学指标换算式。结果表明：随着再生粗骨料取代率和碱激发剂浓度的增加，混凝土拌合物的坍落度降低；试件的抗压强度、劈裂抗拉强度和轴心抗压强度均随着再生粗骨料取代率的增加而减小，随着碱激发剂浓度的增加而增大；建立的抗压强度分别与劈裂抗拉强度和轴心抗压强度的换算式具有较高的拟合精度。 Abstract: The effects of alkali activator concentration (2%, 5%, 8%) and recycled coarse aggregate replacement rate (0, 25%, 50%, 75%, 100%) on the slump, compressive strength, splitting tensile strength and axial compressive strength of PVA fiber concrete were studied, and the mechanical index conversion formulas of alkali activated recycled aggregate fiber concrete were established. The results show that the slump of concrete mixture decreases with the increase of the replacement rate of recycled coarse aggregate and the concentration of alkali activator. The compressive strength, splitting tensile strength and axial compressive strength of the specimen decrease with the increase of the replacement rate of recycled coarse aggregate, and increase with the increase of the concentration of alkali activator. The established conversion formulas of compressive strength, splitting tensile strength and axial compressive strength have high fitting accuracy.

王连坤,林文皓,刘杰,等.碱激发再生骨料纤维混凝土的工作性和力学性能研究[J].混凝土与水泥制品,2023(5):55-58. WANG L K,LIN W H,LIU J,et al.Study on Workability and Mechanical Properties of Alkali Activated Recycled Aggregate Fiber Concrete[J].China Concrete and Cement Product,2023(5):55-58.

房建材料及制品

微孔混凝土及其复合墙体的耐高温性能研究

曹万智，高潇，代佳，张笑笑，叶骐瑞，韩广兴，迟骋

2023年第5期

摘要

引用本文

摘要：采用料浆容重法进行了配合比设计，分别制备了表观密度为 600、800、1 000、1 200 kg/m3 的微孔混凝土，并制作了微孔混凝土-XPS-微孔混凝土复合墙体试块，通过立方体试块高温试验和复合墙体单面受热试验，研究了表观密度和结构形式对微孔混凝土复合墙体试块的耐高温性能的影响。结果表明：随着温度的提高，微孔混凝土的质量损失增加，抗压强度和导热系数降低，表观密度对微孔混凝土的耐高温性能影响较大；表观密度越高，微孔混凝土复合墙体的耐高温性能越好，25 -50-25 mm厚的复合墙体的隔热性能最好。 Abstract: The slurry bulk density method was used to design the mix proportion, and the microporous concrete with apparent density of 600, 800, 1 000 and 1 200 kg/m3 was prepared, the test blocks of microporous concrete-XPS- microporous concrete composite wall was prepared, and the effect of the apparent density and structural form on the high temperature resistance of microporous concrete composite wall was studied by high temperature test of cube specimens and single side heating test of composite walls. The results show that with the increase of temperature, the mass loss of microporous concrete increases, and the compressive strength and thermal conductivity decrease. The apparent density has a significant influence on the high temperature resistance of microporous concrete. With the increase of apparent density, the high temperature resistance of the microporous concrete composite wall increases, and the protective layer of 25 mm thick microporous concrete has the best insulation effect on the corl material.

曹万智,高潇,代佳,等.微孔混凝土及其复合墙体的耐高温性能研究[J].混凝土与水泥制品,2023(5):59-62,73. CAO W Z,GAO X,DAI J,et al.Study on the High Temperature Resistance of Micropoprous Concrete and Its Composite Walls[J].China Concrete and Cement Product,2023(5):59-62,73.

聚合物乳液对水泥砂浆性能影响的研究

王克凡1，龙天艳2，王娟2，周志云1

2023年第5期

摘要

引用本文

摘要：为研究不同聚合物乳液对水泥砂浆的改性效果，将苯丙乳液（SA乳液）、醋酸乙烯-乙烯共聚乳液（VAE乳液）和丁苯乳液（SB乳液）单掺或复掺到砂浆中，并测试了试件的拉伸粘结强度、抗压强度、抗折强度。结果表明：单掺SA乳液和单掺VAE乳液均能提高试件的拉伸粘结强度，但随着聚灰比的增加，单掺VAE乳液时的试件拉伸粘结强度逐渐降低，单掺SA乳液时的试件拉伸粘结强度逐渐升高；复掺乳液对试件拉伸粘结强度的改善作用由大到小依次是SB-SA复配乳液、SB-VAE复配乳液、SA-VAE复配乳液；相同SB乳液掺量下，SA乳液和VAE乳液的掺入分别对试件的拉伸粘结强度、抗压强度的提升效果较好；当mVAE∶mSB为1∶1时，二者可发挥协同作用，进一步提高了试件的拉伸粘结强度和抗压强度。 Abstract: In order to study the modification effects of different polymers on mortar, styrene-acrylic emulsion(SA), vinyl acetate ethylene copolymerization emulsion(VAE) and styrene-butadiene emulsion(SB) were added to the mortar by single or compound. The tensile bond strength, compressive strength, flexural strength were tested. The results show that the tensile bond strength of mortar can be improved with the addition VAE or SA single. With the increase of the ratio of polymer to cement, the tensile bond strength of mortar with single-mixing of VAE gradually decreases, the strength of mortar with single-mixing of SA gradually increases. The improvement effect of mixed emulsion on the tensile bond strength of mortar are in descending order: SB-SA, SB-VAE, SA-VAE. Under the same dosage of SB, the incorporation of SA can improves the tensile bond strength of mortar, and the incorporation of VAE can improve the compressive strength of mortar better. When mVAE∶mSB is 1∶1, it has a synergistic role to further improve the tensile bond strength and compressive strength.

王克凡,龙天艳,王娟,等.聚合物乳液对水泥砂浆性能影响的研究[J].混凝土与水泥制品,2023(5):63-67. WANG K F,LONG T Y,WANG J,et al.Study on the Effect of Polymer Emulsion on the Properties of Cement Mortar[J].China Concrete and Cement Product,2023(5):63-67.

新型夹芯保温叠合楼板的传热机理及热工性能研究

贺庆澳1,2，张明山1,3，李本悦3，邓华2，徐铨彪1,3

2023年第5期

摘要

引用本文

摘要：将保温层置于混凝土叠合楼板的预制底板和现浇顶板之间，提出了一种新型夹芯保温叠合楼板（以下简称新型叠合板），建立了稳态传热分析有限元模型，研究了桁架钢筋间距、夹芯层厚度等对新型叠合板传热系数的影响。结果表明：为满足规范传热要求，夹芯层厚度需超过20 mm、材料导热系数需小于0.15 W/(m·K)；新型叠合板热桥效应明显，桁架钢筋对结构传热系数影响可达13.5%；随着夹芯层保温效果的提高，桁架钢筋间距造成的热阻变化占整体热阻的比例逐渐提高，但占钢筋总影响的比例降低。此外，通过对样本模型数据进行回归分析，得到了具有较高精度的传热系数计算公式，可以用来评估此类新型叠合板的保温性能。 Abstract: A new type of sandwich thermal insulation composite floor slabs was proposed, in which the thermal insulation layer was placed between the precast bottom plate and the cast-in-place top plate of reinforced concrete composite floor slabs. The effects of parameters, such as the spacing between the truss bars and the thickness of the sandwich layer, on the thermal transmittance of the sandwich thermal insulation composite floor slabs were investigated. The results show that, the thickness of sandwich layer should exceed 20 mm, and the thermal conductivity of the material should be less than 0.15 W/(m·K) to meet the heat transfer requirements of the specification. The thermal bridge effect of the sandwich thermal insulation composite floor slabs is obvious, with an impact on the thermal transmittance of the structure up to 13.5%. With the improvement of insulation effect of sandwich layer, the proportion of thermal resistance variation caused by the change of truss spacing to the overall thermal resistance gradually increases, but its proportion to the total influence of truss bars decreases. In addition, a new formula for calculating the thermal transmittance with high accuracy is obtained through the regression analysis of the sample model data, which can quickly evaluate the thermal insulation performance of this new type of composite floor slabs.

贺庆澳,张明山,李本悦,等.新型夹芯保温叠合楼板的传热机理及热工性能研究[J].混凝土与水泥制品,2023(5):68-73. HE Q A,ZHANG M S,LI B Y,et al.Research on the Heat Transfer Mechanism and Thermal Performance of Sandwich Thermal Insulation Composite Floor Slabs[J].China Concrete and Cement Product,2023(5):68-73.

标准解读

JC/T 2723—2022《预应力混凝土实心方桩》标准解读

蒋元海

2023年第4期

摘要

引用本文

为便于 JC/T 2723—2022《预应力混凝土实心方桩》的使用方准确理解标准条款的具体含义，正确贯彻实施标准条款的具体要求和规定，简述了该标准的编制背景、编制目的和意义，解释说明了标准条文的具体内容，并指出了标准实施过程中应注意的事项。 In order to facilitate the user of JC/T 2723—2022 Prestressed Concrete Solid Square Pile to accurately understand the specific meaning of the standard terms and correctly implement the specific requirements and provisions of the standard terms, the preparation background, purpose and significance of the JC/T 2723—2022 are briefly described, the specific contents of the standard provisions are explained in detail, and the problems that should be paid attention to in the implementation process are put forward.

蒋元海.JC/T 2723—2022《预应力混凝土实心方桩》标准解读[J].混凝土与水泥制品,2023(4):81-84. JIANG Y H.Interpretation on JC/T 2723—2022 Prestressed Concrete Solid Square Pile[J].China Concrete and Cement Products,2023(4):81-84.

检测及试验方法研究

灌浆料测强曲线对龄期与抗压强度的适用性研究

赵建华1，谢慧晟2，张建宇1，凌良建2，周红燕3，吕嘉2

2023年第4期

摘要

引用本文

选择不同灌浆料制作了标准试件和模拟孔道PVC管试件，根据DB32/T 3754—2020《装配整体式混凝土结构检测技术规程》的要求，基于标准试件的抗压强度和模拟孔道PVC管试件的表面硬度建立了灌浆料测强曲线，分析了测强曲线对灌浆料龄期和抗压强度的适用性。结果表明：在灌浆料龄期≥14 d或抗压强度≥60 MPa的情况下，采用DB32/T 3754—2020中的方法建立的灌浆料测强曲线的适用性更强，可为实际工程中不同灌浆料实体抗压强度检测时间的选取提供参考。 Different sleeve grouting materials were selected to make standard test pieces and PVC pipe test pieces with simulated channels. According to the requirements of DB32/T 3754—2020 Technical Specification for Inspection of Monolithic Precast Concrete Structure, the strength curve of the grouting material was established based on the compressive strength of standard test pieces and the surface hardness of PVC pipe test pieces with simulated channels, and the applicability of the strength curve to the age and compressive strength was analyzed. The results show that when the age of grouting material is ≥14 days or the compressive strength of grouting material is ≥60 MPa, the strength test curve of grouting material established by the method in DB32/T 3754—2020 is more applicable, which can provide a reference for the selection of the testing time of the solid compressive strength of different grouting materials in practical projects.

赵建华,谢慧晟,张建宇,等.灌浆料测强曲线对龄期与抗压强度的适用性研究[J].混凝土与水泥制品,2023(4):85-87,92. ZHAO J H,XIE H S,ZHANG J Y,et al.Study on the Applicability of Grouting Material Strength Curve to Age and Compressive Strength[J].China Concrete and Cement Products,2023(4):85-87,92.

节能降碳

等强度条件下碱激发高炉镍渣混凝土与普通硅酸盐水泥混凝土的性能对比

李彦贺1，贺茂军1，周能源1，杨峻2，王登权2

2023年第5期

摘要

引用本文

摘要：分别以NaOH和水玻璃为激发剂，制备了碱激发高炉镍渣混凝土，在碱激发高炉镍渣混凝土的7 d抗压强度与普通硅酸盐水泥混凝土的28 d抗压强度基本相等的条件下，对比了碱激发高炉镍渣混凝土和普通硅酸盐水泥混凝土的后期（90 d）力学性能、孔结构发展规律和抗氯离子渗透性能的差异。结果表明：碱激发高炉镍渣混凝土的早期（7 d前）强度发展迅速，其中，NaOH激发高炉镍渣混凝土28 d后的强度发展相对缓慢；等强度条件下，碱激发高炉镍渣混凝土的后期抗压强度和劈裂抗拉强度、孔结构和抗氯离子渗透性能均优于普通硅酸盐水泥混凝土，其中，水玻璃激发高炉镍渣混凝土的各项性能最好。 Abstract: Alkali-activated blast furnace nickel slag concrete was prepared using NaOH and water glass as activator. Under the condition that the 7 days compressive strength of alkali-activated blast furnace nickel slag concrete was basically equal to the 28 days compressive strength of ordinary Portland cement concrete, the differences in mechanical properties, pore structure development rules, and chloride ion penetration resistance between alkali-activated blast furnace nickel slag concrete and ordinary Portland cement concrete at the later stage (90 days) were compared. The results show that the early(before 7 days) strength of the alkali-activated blast furnace nickel slag concrete develops rapidly, and the strength of the NaOH activated blast furnace nickel slag concrete develops relatively slowly after 28 days. Under equal strength conditions, alkali-activated blast furnace nickel slag concrete has better compressive and splitting tensile strength, pore structure, and chloride ion penetration resistance than those of ordinary Portland cement concrete, among which water glass activated blast furnace nickel slag concrete has the best performance.

李彦贺,贺茂军,周能源,等.等强度条件下碱激发高炉镍渣混凝土与普通硅酸盐水泥混凝土的性能对比[J].混凝土与水泥制品,2023(5):79-82. LI Y H,HE M J,ZHOU N Y,et al.Performance Comparison of Alkali-Activated Blast Furnace Nickel Slag Concrete and Ordinary Portland Cement Concrete Under Equal Strength Conditions[J].China Concrete and Cement Product,2023(5):79-82.

锂渣粉和磷渣粉对再生混凝土力学及耐久性能的影响

赵俭斌1，赵港1，杜松岩1，李志军1，张延年1，王震2

2023年第5期

摘要

引用本文

摘要：研究了不同掺量的锂渣粉和磷渣粉分别单掺和复掺对再生混凝土抗压强度和抗氯离子渗透性能的影响。结果表明：与空白组试件相比，单掺锂渣粉或磷渣粉试件的7 d、14 d和28 d抗压强度变化幅度最高不超过7.7%；与锂渣粉和磷渣粉分别单掺相比，二者复掺对再生混凝土的7 d抗压强度影响不大，但明显提高了14 d、28 d抗压强度；单掺和复掺锂渣粉和磷渣粉试件的抗氯离子渗透性能均较空白组试件好，其中，复掺锂渣粉和磷渣粉试件的抗氯离子渗透性能介于单掺锂渣粉试件和单掺磷渣粉试件之间，单掺锂渣粉试件的抗氯离子渗透性能最好；再生混凝土中的氯离子在环境氯离子浓度较低时以物理吸附和化学结合为主，而在环境氯离子浓度较高时以化学结合为主；氯离子总结合能力随着环境氯离子浓度的增加而下降；复掺20%锂渣粉与10%磷渣粉试件的氯离子总结合能力相对最好。 Abstract: The effects of different amounts of lithium slag powder and phosphorus slag powder on the compressive strength and resistance to chloride ion penetration of recycled concrete were studied. The results show that, compared with the blank group, the compressive strength of the specimens mixed with lithium slag powder or phosphorus slag powder at 7 d, 14 d and 28 d has the highest change range of not more than 7.7%. Compared with single addition of lithium slag powder or phosphorus slag powder, their combination has little effect on the 7 d compressive strength of recycled concrete, but significantly improves the 14 d and 28 d compressive strength. The resistance to chloride ion penetration of the specimens with lithium slag powder and phosphorus slag powder is better than that of the blank group. Among them, the resistance to chloride ion penetration of the specimens mixed with lithium slag powder and phosphorus slag powder is between that of the specimens with single lithium slag powder or single phosphorus slag powder, and the resistance to chloride ion penetration of the specimens with single lithium slag powder is the best. The chloride ion in recycled concrete is mainly physical adsorption and chemical binding when the environmental chloride ion concentration is low, while the chloride ion is mainly chemical binding when the environmental chloride ion concentration is high. The total chloride ion binding capacity decreases with the increase of the environmental chloride ion concentration. The total chloride ion binding capacity of the specimen mixed with 20% lithium slag powder and 10% phosphorus slag powder is relatively best.

赵俭斌,赵港,杜松岩,等.锂渣粉和磷渣粉对再生混凝土力学及耐久性能的影响[J].混凝土与水泥制品,2023(5):83-87. ZHAO J B,ZHAO G,DU S Y,et al.Effect of Lithium Slag Powder and Phosphorus Slag Powder on Mechanical and Durability of Recycled Concrete[J].China Concrete and Cement Product,2023(5):83-87.

电炉钢渣用作混凝土骨料的研究进展

韩檬1,2，高成杰3，孙健1,2，张亮亮1,2

2023年第5期

摘要

引用本文

韩檬,高成杰,孙健,等.电炉钢渣用作混凝土骨料的研究进展[J].混凝土与水泥制品,2023(5):88-94. HAN M,GAO C J,SUN J,et al.Research Progress of Electric Arc Furnace Slag as Concrete Aggregates[J].China Concrete and Cement Product,2023(5):88-94.

再生砂和再生粉对干粉砂浆工作性和力学性能的影响

凌刚，徐智勇，胡亮，林希

2023年第5期

摘要

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摘要：将废弃混凝土破碎、筛分制成再生砂和再生粉，研究了再生砂、再生粉分别等质量替代机制砂、石粉对干粉砂浆工作性和力学性能的影响，并对微观结构和水化产物进行了分析。结果表明：再生砂的掺入会增大砂浆的需水量、稠度损失和保水率，降低砂浆的表观密度；再生粉掺入过多会导致砂浆的需水量、表观密度和保水率降低，稠度损失增大；随着再生砂替代率的增加，砂浆的3 d抗压强度降低，28 d抗压强度先增大后减小，这主要归因于再生砂的内养护作用；再生粉对砂浆的3 d和28 d抗压强度影响不大，这主要归因于再生粉的水化作用和晶核效应；综合考虑砂浆的工作性和力学性能，建议再生砂替代率不超过40%，再生粉替代率不超过60%。 Abstract: The effects of recycled sand and recycled powder on the workability and mechanical properties of dry powder mortar were studied, and the microstructure and hydration products were analyzed. The results show that the addition of recycled sand can increase the water demand, consistency loss, and water retention rate of mortar, and reduce the apparent density of mortar. Excessive addition of recycled powder will reduce the water demand, apparent density, and water retention ratio of mortar, and increase the consistency loss. With the increase of the replacement rate of recycled sand, the compressive strength of mortar at 3 days decreases, and the compressive strength at 28 days first increases and then decreases, which is mainly due to the internal curing effect of recycled sand. The influence of recycled powder on the compressive strength of mortar at 3 days and 28 days is not significant, which is mainly due to the hydration and nucleation effects of recycled powder. Considering comprehensively the workability and mechanical properties of mortar, it is recommended that the replacement rate of recycled sand should not exceed 40%, and the replacement rate of recycled powder should not exceed 60%.

凌刚,徐智勇,胡亮,等.再生砂和再生粉对干粉砂浆工作性和力学性能的影响[J].混凝土与水泥制品,2023(5):95-98,102. LING G,XU Z Y,HU L,et al.Effect of Recycled Sand and Recycled Powder on Workability and Mechanical Properties of Dry Powder Mortar[J].China Concrete and Cement Product,2023(5):95-98,102.

大掺量石灰石粉对混凝土性能的影响

何牟1，孟祥杰2

2023年第5期

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摘要：研究了石灰石粉的掺量（0、12%、18%、24%、28%、32%）对混凝土工作性、力学性能和抗碳化性能的影响。结果表明：石灰石粉的掺入对混凝土的7 d抗压强度不利，但复掺适量粉煤灰和石灰石粉可提高混凝土的14 d、28 d和130 d抗压强度；混凝土的碳化深度随着碳化时间的增加而增大，复掺适量的粉煤灰和石灰石粉，同时适当延长养护龄期，可保证混凝土的抗碳化性能基本不变，甚至提高，建议石灰石粉的掺量不超过18%。 Abstract: The influence of limestone powder content (0, 12%, 18%, 24%, 28%, 32%) on the workability, mechanical properties and carbonation resistance of concrete was studied. The results show that the limestone powder is unfavorable to the compressive strength of concrete at 7 days, but adding proper content of fly ash and limestone powder can improve the compressive strength of concrete at 14 days, 28 days and 130 days. The carbonation depth of concrete increases with the increase of carbonation time. Adding proper content of fly ash and limestone powder and properly extending the curing time can ensure that the carbonation resistance of concrete is basically unchanged or even improved. It is recommended that the content of limestone powder should not exceed 18%.

何牟,孟祥杰.大掺量石灰石粉对混凝土性能的影响[J].混凝土与水泥制品,2023(5):99-102. HE M,MENG X J.Influence of Large Content of Limestone Powder on Performance of Concrete[J].China Concrete and Cement Product,2023(5):99-102.

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《混凝土与水泥制品》“3D打印混凝土”与“节能利废混凝土”专题征稿启事

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珊瑚碎屑混凝土的强度特性及破坏形态分析

王磊1,2，范蕾1,2

2015年第1期

摘要

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摘要：针对目前对珊瑚碎屑混凝土的力学机理尚不清晰这一问题，对不同龄期和水灰比的珊瑚混凝土试块进行了试验研究。试验结果表明，珊瑚混凝土具有早强、快硬的特点；同时，当水灰比减小到一定程度后，单纯减小水灰比并不能明显提高珊瑚混凝土的抗压强度。本文从材料特性、界面特性以及龄期和水灰比等方面着手，对珊瑚混凝土的强度特性作了详细分析，并介绍了珊瑚混凝土的破坏形态，从而可为珊瑚碎屑应用于海岛混凝土工程提供一定的参考依据。 Abstract: Currently, the mechanical mechanism of coral debris concrete is not well understood, so the research on coral concrete test block in different age and water cement ratio is carried out. The test results show that coral concrete has the characteristics of fast strengthening and hardening, and when the water cement ratio decreases to a certain extent, simply reducing the water cement ratio could not result in obvious additions of compressive strength of coral concrete. From the aspects of material properties, interface properties，age and water cement ratio, the strength characteristics of the coral concrete are analyzed in detail, and the failure pattern is introduced, which can provide reference for application of coral debris in island concrete engineering.

王磊,范蕾. 珊瑚碎屑混凝土的强度特性及破坏形态分析[J].混凝土与水泥制品,2015(1):1-4. WANG L,FAN L.Strength Characteristic and Failure Pattern Analysis on Coral Debris Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(1):1-4.

装配式结构用高强套筒灌浆料性能试验研究

汪秀石，杨智良，吴照学

2015年第2期

摘要

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摘要：研究了装配式结构用高强套筒灌浆料的性能，通过试配并进行了流动度、强度和膨胀性试验，优选出了优化配合比。同时基于优化配合比进行了水胶比、减水剂掺量和膨胀剂掺量对高强套筒灌浆料性能影响的研究。试验结果表明，随着水胶比（W/B）增加，流动度逐渐增大，但强度随W/B增加呈现明显降低趋势；减水剂可有效改善流动度，而当掺量过多时对强度有一定的影响；膨胀率随膨胀剂掺量增加呈现增长趋势，但当掺量小于8.0%时，膨胀效果较差，掺量大于12.0%时，对流动度和强度产生不利影响。 Abstract: The properties of high-strong cementitious grout for prefabricated concrete structure are studied, and the optimum mix proportion is elected by the tests of fluidity, strength and expansibility. The roles of W/B and the content of superplasticizer or expanders in high-strong cementitious grout for coupler are researched respectively based on the optimum mix proportion. The test results show that the fluidity of the grout increases with the increasing of W/B, but its strength has significantly decreasing trend; the fluidity of the grout can be improved effectively by superplasticizer, but its strength will decrease if superplasticizer content is excessive; expansion rate of the grout increases with the increasing of expanders agent content, but the expansibility is poor when the content is less than 8.0%, and it has an adversely affect on the liquidity and strength of the grout when the content is greater than 12.0%.

汪秀石,杨智良,吴照学.装配式结构用高强套筒灌浆料性能试验研究[J].混凝土与水泥制品,,2015(2):65-68. WANG X S,YANG Z L,WU Z X.Experimental Research on Performance of High-strong Cementitious Grouting for Prefabricated Concrete Structure[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(2):65-68.

再生粗骨料强化处理工艺对再生混凝土性能的影响

郭远新，李秋义，孔哲，岳公冰，韩帅

2015年第6期

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摘要：分别采用物理强化、化学强化和物理-化学复合强化三种不同的强化方式对简单破碎再生粗骨料进行强化处理，并采用100%取代天然碎石制备再生粗骨料混凝土，研究了不同强化处理后的再生粗骨料对混凝土工作性能、力学性能、抗渗透性能和抗碳化性能的影响。结果表明，经过强化处理的再生粗骨料混凝土的各项性能均有不同程度的提高，其中经二次物理强化处理后的再生粗骨料混凝土的用水量较天然碎石混凝土仅增加了6kg/m3，其抗压强度也达到最高值，接近于天然碎石混凝土；经二次物理强化和化学浸渍复合强化处理后的再生混凝土氯离子扩散系数降低了13.6%；三种不同的强化方式处理后，再生混凝土的碳化深度和碳化速度均有所降低。 Abstract: Three kinds of different strengthening technologies of physical enhancement, chemical enhancement and physical-chemical compound enhancement to strengthen the simple crushing recycled coarse aggregate are adopted, with 100% replaced natural gravel preparation of recycled coarse aggregate concrete, and the influences of the recycled coarse aggregate of different strengthening treatment on the working performance, mechanical properties, penetration resistance and carbonation resistance of concrete are studied. The research results show that, through strengthening treatment, recycled coarse aggregate concrete properties are improved to different degrees, the water consumption of recycled coarse aggregate concrete after the secondary physical strengthen treatment is only increased by 6kg/m3 than that of natural gravel concrete. The compressive strength also reached the highest value, close to the natural gravel concrete. The chloride ion diffusion coefficient of recycled concrete after the secondary physical-chemical compound strengthening treatment is reduced by 13.6%. The depth of carbonation and carbonation velocity decrease after three kinds of different strengthening treatments.

郭远新,李秋义,孔哲,等.再生粗骨料强化处理工艺对再生混凝土性能的影响[J].混凝土与水泥制品,2015(6):11-17. GUO Y X,LI Q Y,KONG Z,et al.Influence of Strengthening Treatment Technology of Recycled Coarse Aggregate on Performance of Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(6):11-17.

无砂再生透水混凝土配合比设计

张松涛1，贾欣悦2，宋卓1，贾艳东1

2016年第12期

摘要

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张松涛,贾欣悦,宋卓,等.无砂再生透水混凝土配合比设计[J].混凝土与水泥制品,2016(12):6-12. ZHANG S T,JIA X Y,SONG Z,et al.Design on Mix Proportion of No-fines Pervious Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(12):6-12.

清水混凝土概念、研究现状、存在问题及配合比设计方综述

郭伟1，路林海2，王龙志3，崔鑫3，王桂玲4，张海霞3

2016年第10期

摘要

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摘要：20世纪90年代后期以来，清水混凝土研究及工程应用得到了长足发展，许多城市建成了清水混凝土标志性工程。为了更好地促进清水混凝土研究的深入、工程质量的提高，对清水混凝土的概念、研究现状、存在问题及现有的清水混凝土配合比设计方法进行了系统地梳理、总结。通过对清水混凝土现状的研究，可使相关领域技术人员认识到清水混凝土发展中存在的不足、明确清水混凝土的研究方向，以实现清水混凝土技术研究水平的再提高，有力地支持清水混凝土工程应用的进一步推广。 Abstract: Since the late 1990s, research and application of fair-faced concrete has made considerable progress, many cities built landmark projects of fair-faced concrete. In order to better promote the study in-depth and the engineering quality improvement of fair-faced concrete, the concept, research status, existing problems and mixture design methods of fair-faced concrete are systematically reviewed and summarized. Through the above study of fair-faced concrete, the relevant technicians recognize the lack of fair-faced concrete in the development and realize a clear research direction, in order to improve research level, strongly support further promotion of fair-faced concrete in engineering applications.

郭伟,路林海,王龙志,等.清水混凝土概念、研究现状、存在问题及配合比设计方法综述[J].混凝土与水泥制品,2016(10):23-27. GUO W,LU L H,WANG L Z,et al.Summary for Concept, Research Status, Existing Problems and Mix Proportion Design of Fair-faced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(10):23-27.

新型装配式建筑构件生产及其施工技术的研究与应用

范玉1,4，徐华2，黄新3，黄继战4，马北京4

2015年第12期

摘要

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摘要：通过对建筑PC构件的设计、生产、施工进行的研究，对建筑PC构件进行了再设计及优化，确定了合理的PC构件生产及其施工工艺方案，并对影响PC构件质量的相关因素进行了分析。 Abstract: Through the research on design of PC component, production and construction, construction PC component is carried out for re-design and optimization. The reasonable PC component production and construction technology program are determined, and factors affecting the quality of PC are analyzed.

范玉,徐华,黄新,等.新型装配式建筑构件生产及其施工技术的研究与应用[J].混凝土与水泥制品,2015(12):87-89. FAN Y, XU H,HUANG X,et al.Research and Application of Production for New Type of Prefabricated Construction Component and Its Construction Technology[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):87-89.

石墨烯纳米片对水泥基复合材料力学性能的影响

王辉，刘爱红，李航

2015年第12期

摘要

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摘要：采用球磨法将石墨烯纳米片分散在水泥基体中，研究了石墨烯纳米片掺量对水泥基材料抗折强度和抗压强度的影响。实验结果表明，适量的石墨烯纳米片可均匀分散在水泥基体中，通过桥联效应和拔出效应对水泥基材料起增强增韧作用，当石墨烯纳米片掺量为0.04%时，石墨烯纳米片与水泥基体界面结合良好，没有明显过渡层，试件3d抗折强度和抗压强度分别提高了22.84%和23.61%。 Abstract: Graphene nanoplatelets (GNPs) were dispersed in the cement matrix by milling method. The effect of GNPs with different contents on the flexural strength and compressive strength of composites were studied. The results showed that well dispersed GNPs improved the mechanical properties of cement composites, owing to GNPs excellent pulling-out and bridging capability. When the GNPs content was 0.04%, the mechanical properties of cement composites were increased obviously. Its flexural and compressive strength increased by 22.84% and 23.61% respectively compared with the referee sample after curing 3 days. The interface between graphene nanoplatelets and cement was bonded well, with no obvious transition layer.

王辉,刘爱红,李航.石墨烯纳米片对水泥基复合材料力学性能的影响[J].混凝土与水泥制品,2015(12):25-27. WANG H,LIU A H,LI H.Influence of Graphene Nanoplatelets on Mechanical Properties of Cement-based Composites[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):25-27.

大型智能PC构件自动化生产线简介

孙红1，孙健1，吴玉厚1，赵凯军2

2015年第3期

摘要

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摘要：根据混凝土工厂化生产的需要，阐述了大型智能PC构件生产线的组成部分、工艺过程和技术重点；分析了该生产线中蕴含的微观物流、信息采集、分布式控制及多智能体的协同过程，总结了PC构件生产线的优点和技术创新突破点，可为大型智能PC构件全自动生产线的研制提供理论基础和技术依据。 Abstract: According to the needs of the concrete factory production, the large scale intelligent automatic PC production line the technological process and technical keys of PC component are introduced, the cooperative process of microscopic logistics, information acquisition, distributed control and multi-agent systems are analyzed, the advantages and technology innovation of PC components production line are summarized, which can provide theoretical basis and technical basis for large scale intelligent automatic production line of PC components.

孙红,孙健,吴玉厚,等.大型智能PC构件自动化生产线简介[J].混凝土与水泥制品,2015(3):45-48. SUN H,SUN J,WU Y H,et al.Introduction of Large Scale Intelligent PC Automatic Production Line[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(3):45-48.

建筑垃圾再生微粉的研究现状

毛新奇1,2，屈文俊1，朱鹏1

2015年第8期

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摘要：建筑垃圾再生微粉各项性能的研究是推进建筑垃圾资源化的重要基础。根据近年来国内关于再生微粉的主要研究成果，对材料来源、制备工艺、工作性能、力学性能和耐久性能等方面进行了综述，并对相关的影响因素进行了探讨分析。 Abstract: Research on the properties of utilization regeneration of powder for construction waste is the important foundation of resource utilization of construction waste. Based on the recent domestic research on recycled powder, material source, manufacturing process, workability, mechanical properties and the durability are reviewed. Besides, the related influence factors are discussed and analyzed.

毛新奇,屈文俊,朱鹏.建筑垃圾再生微粉的研究现状[J].混凝土与水泥制品,2015(8):89-93. MAO X Q,QU W J,ZHU P.Study Status of Recycled Powder for Construction Waste[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(8):89-93.

再生粗骨料及再生混凝土性能研究进展

甘福1，周脉席1,3，濮琦2

2018年第9期

摘要

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摘要：结合国内外再生粗骨料混凝土的研究现状，综述了再生粗骨料性能、再生粗骨料混凝土性能、再生混凝土改性方法及改性后的混凝土性能等方面内容，展望了再生粗骨料及再生混凝土未来研究方向。 Abstract: Combining the study of recycled coarse aggregate concrete at home and abroad, the property of recycled coarse aggregate, the performance of recycled coarse aggregate concrete, the modified method of recycled concrete and the performance of modified concrete are reviewed, and the fature research direction on recycled coarse aggregate and recycled concrete is prospected.

甘福,周脉席,濮琦.再生粗骨料及再生混凝土性能研究进展[J].混凝土与水泥制品,2018(9):102-107. GAN F,ZHOU M X,PU Q.Research Progress of Performance of Recycled Coarse Aggregate and Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2018(9):102-107.

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